Transmission with pump body structure and vehicle with transmission

Abstract

The invention provides a transmission with a pump body structure and a vehicle with the transmission. The transmission comprises a shell, a pump body assembly and a driving shaft. The shell is provided with a containing cavity, and an oil inlet channel and an oil outlet channel are formed in the side wall of the containing cavity. The pump body assembly is arranged in the containing cavity and provided with a rotor system and a connecting shaft, the first end of the connecting shaft is connected with the rotor system, and the rotor system is provided with a high-pressure side and a low-pressure side; the driving shaft is connected with the second end of the connecting shaft and used for driving the connecting shaft to drive the rotor system to rotate so that the high-pressure side can be in a communicating state when communicating with the oil outlet channel, and the low-pressure side can be in a communicating state when communicating with the oil inlet channel. The problems that in the prior art, due to the fact that a transmission lubricating oil pump is arranged outside, the overall size is increased, and the lubricating oil leakage risk is increased are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive transmissions, and more particularly, to a transmission having a pump body structure and a vehicle having the same. Background Art

[0002] In the current technical field of transmissions, the design and arrangement of the lubricating oil pump are key considerations. In traditional transmission structures, the lubricating oil pump is usually designed as an external component independent of the transmission body to facilitate power transmission with the rotating system inside the transmission. Although this design method meets the lubrication requirements of the transmission to a certain extent, it also brings a series of technical deficiencies and problems.

[0003] Firstly, the externally arranged lubricating oil pump significantly increases the overall size of the transmission. Since the lubricating oil pump requires additional installation space, this not only limits the flexibility of the vehicle chassis design but may also affect the arrangement of other important components, such as the engine, drive shaft, or the vehicle's suspension system.

[0004] Secondly, the structural design of the external lubricating oil pump increases the complexity of the oil circuit, thereby increasing the risk of lubricating oil leakage. The connection between the oil pump and the transmission needs to be completed through multiple interfaces and pipelines, and these interfaces and pipelines may cause lubricating oil leakage due to wear or improper assembly during long-term use, thus affecting the normal operation of the transmission and even polluting the environment.

[0005] Furthermore, the addition of an external lubricating oil pump makes the structure of the entire transmission lubrication system more complex. The control, maintenance of the lubricating oil pump, and the coordination with the internal transmission system of the transmission require additional consideration and design, which not only increases the design difficulty of the lubrication system but may also increase the later maintenance cost and reduce the overall efficiency and reliability of the transmission.

[0006] In response to the above problems, no effective solutions have been proposed yet. Summary of the Invention

[0007] The main objective of the present invention is to provide a transmission having a pump body structure and a vehicle having the same, so as to solve the problems of increased overall size and increased risk of lubricating oil leakage caused by the external arrangement of the transmission lubricating oil pump in the prior art.

[0008] To achieve the above object, according to one aspect of the present invention, there is provided a transmission having a pump body structure, comprising: a housing having an accommodation cavity, and an oil inlet passage and an oil outlet passage are provided on the side wall of the accommodation cavity; a pump body assembly disposed in the accommodation cavity, the pump body assembly having a rotor system and a connecting shaft, the first end of the connecting shaft is connected to the rotor system, and the rotor system has a high-pressure side and a low-pressure side; a driving shaft connected to the second end of the connecting shaft, the driving shaft is used to drive the connecting shaft to drive the rotor system to rotate, so that the high-pressure side has a communication state when communicating with the oil outlet passage, and the low-pressure side has a communication state with the oil inlet passage.

[0009] Further, the pump body assembly includes: a fixing ring located in the accommodation cavity, and the fixing ring is in interference fit with the inner wall of the housing; a partition plate disposed between the fixing ring and the driving shaft, one side of the partition plate abuts against the bearing of the transmission, the other side of the partition plate abuts against the fixing ring, and an accommodation space is formed between the partition plate, the fixing ring and the housing, the rotor system is disposed in the accommodation space, the driving shaft is connected to the housing through a bearing, and one end of the connecting shaft passes through the partition plate and is connected to the driving shaft.

[0010] Further, the rotor system includes: a driving rotor disposed circumferentially along the connecting shaft, and the driving rotor is fixedly connected to the connecting shaft; a driven rotor disposed circumferentially along the driving rotor, and the driven rotor is meshed with the driving rotor, the driving shaft is used to drive the connecting shaft to drive the driving rotor to rotate, and the driving rotor drives the driven rotor to rotate in the accommodation space through meshing transmission, so that the driven rotor forms a high-pressure side and a low-pressure side in the accommodation space.

[0011] Further, there is a first eccentricity between the central axis of the driving rotor and the central axis of the driven rotor.

[0012] Further, the fixing ring includes: a fixing ring body, the outer diameter dimension of the fixing ring body is the same as the maximum dimension of the partition plate, the axial dimension of the fixing ring body is greater than the axial dimensions of the driving rotor and the driven rotor, and the driven rotor is in clearance fit with the inner wall of the fixing ring body; wherein, the inner ring of the fixing ring body is eccentrically disposed with respect to the outer ring of the fixing ring body, and the outer ring of the fixing ring body is coaxially disposed with the connecting shaft, and there is a second eccentricity between the inner ring and the outer ring of the fixing ring body, and the second eccentricity is the same as the first eccentricity, and the driven rotor rotates along the inner ring of the fixing ring body.

[0013] Further, an annular boss is provided on the partition plate, and the end face dimension of the annular boss is the same as the end face dimension of the inner ring of the bearing, and the annular boss abuts against the bearing.

[0014] Further, during the relative rotation of the driving rotor and the driven rotor, the volume between the driving rotor and the driven rotor alternately forms a low-pressure side and a high-pressure side.

[0015] Further, the oil inlet passage includes a low-pressure oil tank and an oil suction port. The low-pressure oil tank is disposed on the side wall of the accommodating cavity away from the driving shaft, and the bottom of the low-pressure oil tank is provided with an oil suction port in a penetrating manner.

[0016] Further, the oil outlet passage includes: a high-pressure oil tank and an oil discharge port. The high-pressure oil tank and the low-pressure oil tank are symmetrically arranged along the axis of the driving shaft, and the bottom of the high-pressure oil tank is provided with an oil discharge port in a penetrating manner.

[0017] To achieve the above object, according to another aspect of the present invention, a vehicle is provided, including a transmission, and the transmission is the transmission in any one of the above embodiments.

[0018] Applying the technical solution of the present invention, by integrating the pump body assembly inside the transmission housing, the overall size of the transmission is significantly reduced, and the internal space layout of the vehicle is optimized. The direct connection between the driving shaft and the connecting shaft realizes the synchronization of the operation of the oil pump and the transmission. The driving shaft drives the connecting shaft to drive the rotor system to rotate, so that the high-pressure side has a communicating state when communicating with the oil outlet passage, and the low-pressure side has a communicating state when communicating with the oil inlet passage, realizing the efficient pumping and circulation of the lubricating oil, and enhancing the lubrication effect of the transmission. By this application, the problems of the increase in the overall size and the increase in the risk of lubricating oil leakage caused by the arrangement of the transmission lubricating oil pump outside in the prior art are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 Shows a schematic structural diagram of a first embodiment of a transmission with a pump body structure according to the present invention;

[0021] Figure 2 Shows a schematic structural diagram of a second embodiment of a transmission with a pump body structure according to the present invention;

[0022] Figure 3 Shows a schematic structural diagram of an embodiment of a fixing ring according to the present invention;

[0023] Figure 4 Shows a schematic structural diagram of a first embodiment of a partition according to the present invention;

[0024] Figure 5 Shows a schematic structural diagram of a second embodiment of a partition according to the present invention;

[0025] Figure 6 Shows a schematic structural diagram of a third embodiment of a transmission with a pump body structure according to the present invention;

[0026] Figure 7 Shows a schematic structural diagram of a fourth embodiment of a transmission having a pump body structure according to the present invention.

[0027] Wherein, the above-mentioned drawings include the following reference numerals:

[0028] 100, pump body assembly;

[0029] 110, connecting shaft;

[0030] 120, driving rotor;

[0031] 130, driven rotor;

[0032] 140, fixing ring;

[0033] 150, partition plate;

[0034] 151, annular boss;

[0035] 200, drive shaft;

[0036] 300, bearing;

[0037] 400, housing;

[0038] 410, low-pressure oil tank;

[0039] 420, high-pressure oil tank;

[0040] 430, oil suction port;

[0041] 440, oil discharge port;

[0042] 500, low-pressure side;

[0043] 600, high-pressure side. Detailed implementation manners

[0044] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0045] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0046] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0047] Now, exemplary embodiments according to the present application will be described in more detail with reference to the drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present application is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and thus their description will be omitted.

[0048] Combined with Figures 1 to 7 As shown, according to a specific embodiment of the present application, a transmission having a pump body structure and a vehicle having the same are provided.

[0049] Specifically, the transmission includes: a housing 400, a pump body assembly 100, and a drive shaft 200. The housing 400 has a receiving cavity, and an oil inlet passage and an oil outlet passage are provided on the side wall of the receiving cavity; the pump body assembly is disposed in the receiving cavity, the pump body assembly has a rotor system and a connecting shaft 110, the first end of the connecting shaft 110 is connected to the rotor system, and the rotor system has a high-pressure side 600 and a low-pressure side 500; the drive shaft 200 is connected to the second end of the connecting shaft 110, and the drive shaft 200 is used to drive the connecting shaft 110 to drive the rotor system to rotate, so that the high-pressure side 600 has a communication state when communicating with the oil outlet passage, and the low-pressure side 500 has a communication state when communicating with the oil inlet passage.

[0050] Applying the technical solution of the present invention, by integrating the pump body assembly inside the transmission housing 400, the overall size of the transmission is significantly reduced, and the internal space layout of the vehicle is optimized. The direct connection between the drive shaft 200 and the connecting shaft 110 realizes the synchronization of the oil pump and the operation of the transmission. The drive shaft 200 drives the connecting shaft 110 to drive the rotor system to rotate, so that the high-pressure side 600 has a connected state when communicating with the oil outlet passage, and the low-pressure side 500 has a connected state when communicating with the oil inlet passage, realizing the efficient pumping and circulation of the lubricating oil and enhancing the lubrication effect of the transmission. By this application, the problems of increased overall size and increased risk of lubricating oil leakage caused by arranging the transmission lubricating oil pump outside in the prior art are solved.

[0051] In this embodiment, the connection between the drive shaft 200 and the connecting shaft 110 is achieved through spline fit. The spline connection is realized by the internal spline on the drive shaft 200 matching with the external spline on the connecting shaft 110 to form a mechanically interlocked structure. Splines are usually composed of a series of key grooves (internal splines) and key teeth (external splines) parallel to the axis. These key grooves and key teeth have a clear positioning function in the axial direction, and in the radial direction, torque is transmitted through the precise fit between the key teeth and the key grooves. The tight fit between the key teeth and key grooves of the spline ensures the precise alignment of the drive shaft 200 and the connecting shaft 110 in the axial direction and can also maintain the coaxiality between the two shafts while transmitting power, which is crucial for the smooth operation of the lubricating oil pump at high speeds. The spline connection allows torque to be transmitted between the drive shaft 200 and the connecting shaft 110 without sliding and without clearance, reducing power loss and improving transmission efficiency, ensuring that the lubricating oil pump can efficiently pump lubricating oil to each lubrication point of the transmission.

[0052] Furthermore, the pump body assembly 100 includes: a fixing ring 140 and a partition 150. The fixing ring 140 is located in the accommodating cavity, and the fixing ring 140 is in interference fit with the inner wall of the housing 400; the partition 150 is arranged between the fixing ring 140 and the drive shaft 200. One side of the partition 150 abuts against the bearing 300 of the transmission, and the other side of the partition 150 abuts against the fixing ring 140. A accommodating space is formed between the partition 150, the fixing ring 140 and the housing 400. The rotor system is arranged in the accommodating space. The drive shaft 200 is connected to the housing 400 through the bearing 300, and one end of the connecting shaft 110 passes through the partition 150 to be connected to the drive shaft 200. Through the structures of the fixing ring 140 and the partition 150, the axial and radial displacements of the rotor system are restricted, ensuring the stable operation of the rotor system inside the accommodating space.

[0053] Specifically, the fixed ring 140 is located within the accommodation cavity and forms an interference fit with the inner wall of the housing 400. This design ensures the radial fixation of the fixed ring 140 inside the housing 400, preventing the radial movement of the fixed ring 140 during the operation of the pump body assembly, thus ensuring the structural stability of the lubricating oil pump and avoiding the reduction in the efficiency or damage of the oil pump caused by the displacement of the fixed ring 140.

[0054] The partition plate 150 is arranged between the fixed ring 140 and the drive shaft 200. One side of it abuts tightly against the bearing 300 of the transmission, and the other side abuts tightly against one surface of the fixed ring 140. This abutting design ensures the axial fixation of the partition plate 150. At the same time, a sealed accommodation space is jointly formed between the partition plate 150, the fixed ring 140 and the housing 400, providing a working environment for the rotor system and ensuring the smooth operation of the rotor system and the sealing performance of the oil pump. The drive shaft 200 is connected to the housing 400 through the bearing 300. The bearing 300 not only provides radial support for the drive shaft 200, but also assists the partition plate 150 to axially limit the fixed ring 140 through its own pre-tightening force.

[0055] It should be further noted that the inner ring of the bearing 300 forms an interference fit with the drive shaft 200, and the outer ring of the bearing 300 forms an interference fit with the inner wall of the housing 400.

[0056] The inner ring of the bearing 300 is tightly sleeved on the drive shaft 200. The interference fit ensures the firm combination of the inner ring and the drive shaft 200. Even under high-speed rotation, it can prevent the inner ring from sliding relative to the drive shaft 200, ensuring the high efficiency and stability of power transmission.

[0057] The outer ring of the bearing 300 is also tightly combined with the inner wall of the housing 400 by means of an interference fit. This design provides a strong radial support force, preventing the bearing 300 from being displaced due to lateral forces during operation and enhancing the rigidity and durability of the overall structure of the oil pump.

[0058] Specifically, the rotor system includes: a driving rotor 120 and a driven rotor 130. The driving rotor 120 is arranged circumferentially along the connecting shaft 110 and is fixedly connected to the connecting shaft 110; the driven rotor 130 is arranged circumferentially along the driving rotor 120 and is meshed with the driving rotor 120. The driving shaft 200 is used to drive the connecting shaft 110 to drive the driving rotor 120 to rotate. The driving rotor 120 drives the driven rotor 130 to rotate in the accommodation space through meshing transmission, so that the driven rotor 130 forms a high-pressure side 600 and a low-pressure side 500 in the accommodation space. Through the precise meshing of the driving rotor 120 and the driven rotor 130 and the dynamically changing chamber design in this embodiment, not only efficient and stable oil pumping is achieved, but also through the system integration design, the structural layout of the transmission is optimized and the sealing performance of the system is improved.

[0059] The driving rotor 120 is arranged circumferentially along the connecting shaft 110 and is fixedly connected to the connecting shaft 110 in a certain way (such as key connection, interference fit, etc.). This means that when the connecting shaft 110 rotates driven by the driving shaft 200, the driving rotor 120 will rotate synchronously, ensuring direct and lossless power transmission. The driven rotor 130 is arranged circumferentially along the driving rotor 120 and is meshed with the driving rotor 120 through precisely designed tooth profiles. This meshing ensures power transmission between the driven rotor 130 and the driving rotor 120.

[0060] As Figure 2 shown, during the rotation of the driving rotor 120 and the driven rotor 130, their meshing and disengagement form closed chambers. When the rotor system rotates, the volume of these closed chambers changes periodically, thus forming different oil pressures in the chambers. At specific positions, the cooperation between the driving rotor and the driven rotor forms a high-pressure side 600 and a low-pressure side 500. Through the precise meshing of the driving rotor 120 and the driven rotor 130, the rotor system realizes effective pumping of oil from the low-pressure side 500 to the high-pressure side 600. Driven by the rotation of the driving rotor 120, the driven rotor 130 rotates in the accommodation space. The change in the volume of the closed chamber causes oil to be sucked in (low-pressure side) and discharged (high-pressure side). This process continuously cycles during the continuous rotation of the rotor, ensuring continuous and stable supply of lubricating oil and improving the pumping efficiency.

[0061] Specifically, there is a first eccentricity between the central axis of the driving rotor 120 and the central axis of the driven rotor 130. When the driving rotor 120 rotates driven by the driving shaft 200, due to the existence of the first eccentricity, the driven rotor 130 rotates self in the cavity, forming a cycle process in which oil is sucked in from the low-pressure side 500, transmitted through the inside of the cavity, and finally discharged from the high-pressure side 600.

[0062] Further, asFigure 3 As shown, the fixed ring 140 includes: a fixed ring body, the outer diameter of the fixed ring body is the same as the maximum size of the partition 150, the axial dimension of the fixed ring body is greater than the axial dimensions of the driving rotor 120 and the driven rotor 130, and the driven rotor 130 is in clearance fit with the inner wall of the fixed ring body; wherein, the inner ring of the fixed ring body is eccentrically arranged with respect to the outer ring of the fixed ring body, and the outer ring of the fixed ring body is coaxially arranged with the connecting shaft 110, and there is a second eccentricity between the inner ring and the outer ring of the fixed ring body, and the second eccentricity is the same as the distance of the first eccentricity, and the driven rotor 130 rotates along the inner ring of the fixed ring body.

[0063] The outer diameter of the fixed ring body matches the maximum radial dimension of the partition 150. This design ensures a good docking between the fixed ring and the partition, forming a complete annular wall surface, providing a stable working boundary for the rotor system. The axial dimension of the fixed ring body is greater than the axial dimensions of the driving rotor 120 and the driven rotor 130. The purpose of this design is to reserve sufficient axial space for the rotor system, avoiding direct contact between the fixed ring body, the partition 150 and the rotor system, ensuring the free rotation of the rotor system within the accommodation space formed by the fixed ring 140, the partition 150 and the housing 400, thereby improving the pumping efficiency and the service life of the rotor system.

[0064] The second eccentricity between the inner and outer rings of the fixed ring body is the same as the first eccentricity. This design ensures that the driven rotor 130 can slide smoothly within the inner ring of the fixed ring, achieving efficient meshing with the driving rotor and forming an effective pumping action. The driven rotor 130 is in clearance fit with the inner wall of the fixed ring body, ensuring non-contact rotation between the driven rotor 130 and the inner ring of the fixed ring.

[0065] Specifically, as Figure 4 、 Figure 5 shown, the partition 150 is provided with an annular boss 151, the end face dimension of the annular boss 151 is the same as the end face dimension of the inner ring of the bearing 300, and the annular boss 151 abuts against the bearing 300. Through the abutment of the annular boss 151 and the bearing 300, the axial limit of the fixed ring 140 is carried out by using the pre-tightening force of the bearing 300, thereby ensuring the stable operation of the pump body assembly 100 inside the housing 400.

[0066] The precise fit of the inner and outer rings of the bearing, combined with the axial limit of the partition 150 and the fixed ring 140, forms a closed and stable working environment, minimizing the vibration and noise during the operation of the oil pump, enhancing the sealing performance of the oil pump, and reducing the risk of lubricating oil leakage.

[0067] Specifically, during the relative rotation of the driving rotor 120 and the driven rotor 130, the volume between the driving rotor 120 and the driven rotor 130 alternately forms a low-pressure side 500 and a high-pressure side 600. By utilizing the volume change formed during the relative rotation of the rotor system, a pressure difference of the oil is generated between the low-pressure side 500 and the high-pressure side 600, thereby realizing the suction and discharge of the oil, improving the pumping efficiency of the oil pump, and enhancing the sealing performance and reliability of the system.

[0068] As the driving rotor 120 and the driven rotor 130 rotate relative to each other, the contact points between them continuously change, resulting in the different volume regions formed inside the rotor system alternately experiencing the processes of compression and expansion. This dynamic change generates two key regions: the low-pressure side 500 and the high-pressure side 600. The low-pressure side 500 refers to the stage when the oil chamber expands, at this time the volume increases, the oil pressure decreases, and the lubricating oil is sucked into the chamber; the high-pressure side 600 is the stage when the oil chamber is compressed, the volume decreases, the oil pressure increases, and the lubricating oil is pushed out of the chamber. When the drive shaft 200 drives the driving rotor 120 to rotate, the teeth of the driving rotor 120 mesh with the teeth of the driven rotor 130. This relative rotational movement prompts the lubricating oil to flow in the chamber formed by the rotor system, thereby realizing the pumping function of the oil pump.

[0069] Specifically, as Figure 6 , Figure 7 shown, the oil inlet passage includes a low-pressure oil groove 410 and an oil suction port 430. The low-pressure oil groove 410 is arranged on the side wall of the accommodating chamber away from the drive shaft 200, and the bottom of the low-pressure oil groove 410 is provided with an oil suction port 430 in a penetrating manner.

[0070] The low-pressure oil groove 410 is arranged on the side wall of the accommodating chamber away from the drive shaft 200. This position selection is based on the working principle of the oil pump and hydrodynamic considerations. The side away from the drive shaft 200 means that the lubricating oil does not need to be affected by high-intensity centrifugal force before entering the low-pressure oil groove 410, which is more conducive to the smooth introduction of the oil. The bottom of the low-pressure oil groove 410 is provided with an oil suction port 430 communicating therewith. This design ensures that the lubricating oil can directly enter the low-pressure side 500 from the bottom of the low-pressure oil groove 410, avoiding unnecessary detours, reducing the resistance of the oil flow, and improving the oil pumping efficiency.

[0071] Optionally, one end of the oil suction port 430 away from the accommodating chamber is connected to a tubing, ensuring that the lubricating oil can be continuously pumped into the rotor system. This design not only improves the working stability of the oil pump, but also provides a lasting and stable oil supply for the transmission lubrication system, reducing the risk of lubrication failure.

[0072] Specifically, the integrated design of the oil suction port 430 and the low-pressure oil tank 410 simplifies the structural complexity, reduces the manufacturing cost and maintenance difficulty. At the same time, this design helps to better integrate the pump body assembly with the transmission housing 400, optimizes the internal space layout of the vehicle, and promotes the overall compactness and lightweight of the vehicle design.

[0073] Specifically, the oil outlet passage includes: a high-pressure oil tank 420 and an oil drain port 440. The high-pressure oil tank 420 and the low-pressure oil tank 410 are symmetrically arranged along the axis of the drive shaft 200. The bottom of the high-pressure oil tank 420 is provided with an oil drain port 440 in a penetrating manner. By providing the high-pressure oil tank 420 and the oil drain port 440, a necessary passage for the discharge of the oil fluid is provided. At the same time, by controlling the position of the oil drain port 440, it is ensured that the oil fluid can be accurately discharged from the rotor system.

[0074] The high-pressure oil tank 420 is located within the housing 400 and is symmetrically arranged with the low-pressure oil tank 410 along the axis of the drive shaft 200. This symmetrical design ensures that when the rotor system rotates, the pressure distribution in the oil chamber is uniform, avoiding additional stress caused by asymmetry, ensuring the smooth operation of the pump body assembly and extending its service life. The opening of the high-pressure oil tank 420 is precisely aligned with the high-pressure side 600 formed by the meshing of the driving rotor 120 and the driven rotor 130. In this way, it can be ensured that when the oil chamber reaches the maximum pressure, the lubricating oil can quickly flow into the high-pressure oil tank 420 and then be discharged through the oil drain port 440, realizing fast and efficient oil fluid transmission.

[0075] The optimized design of the oil outlet passage reduces the resistance and energy loss during the oil fluid transmission process, helps to reduce the total energy consumption of the oil pump, and improves the energy utilization rate. At the same time, the fast and accurate discharge of the oil fluid reduces the time that the oil fluid stays inside the oil pump, accelerates the oil fluid circulation, and improves the efficiency and response speed of the entire lubrication system.

[0076] One end of the oil drain port 440 far away from the accommodation cavity is connected with an oil pipe, and the lubricating oil can quickly pass through the oil pipe and be discharged, realizing fast and efficient oil fluid transmission.

[0077] In a specific embodiment, for a transmission with a pump body structure, the drive shaft 200 is connected to the connecting shaft 110 through spline fit. When the transmission is operating normally, the rotational power of the drive shaft 200 is directly transmitted to the connecting shaft 110, causing the connecting shaft 110 to rotate accordingly. When the connecting shaft rotates driven by the drive shaft, it simultaneously drives the active rotor 120 fixed thereon and the driven rotor 130 located in the accommodation cavity to rotate. Since the active rotor 120 and the driven rotor 130 are meshed with each other through a tooth-shaped structure, during the rotation of the rotor system, the volume of the enclosed cavity (i.e., the oil cavity) formed between the active rotor 120 and the driven rotor 130 will change periodically. When the volume of the oil cavity increases, a low-pressure side 500 is formed. At this time, the lubricating oil is sucked in through the oil inlet passage (including the low-pressure oil groove and the oil suction port). At this time, the high-pressure side 600 and the oil outlet passage are in a closed state, and the low-pressure side and the oil inlet passage are in a connected state; when the volume of the oil cavity decreases, a high-pressure side 600 is formed. At this time, the oil is discharged through the oil outlet passage (including the high-pressure oil groove and the oil drain port) and enters the lubrication system of the transmission to complete the pumping process. At this time, the high-pressure side and the oil outlet passage are in a connected state, and the low-pressure side and the oil inlet passage are in a closed state. During the operation of the pump body assembly, the oil suction and oil discharge processes alternate with the rotation of the rotor system.

[0078] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0079] 1. By integrating the pump body assembly into the transmission housing and directly using the internal shaft system of the transmission as the driving force, this technical solution greatly reduces the independent space occupation ratio of the oil pump system and eliminates the additional expansion requirement of the traditional external oil pump for the transmission size. This design not only reduces the volume and weight of the transmission, but also simplifies the structure of the lubrication system, improves the operating efficiency of the oil pump and the entire lubrication system, and reduces energy consumption.

[0080] 2. The pump body assembly is placed in the accommodation cavity, and a stable and enclosed working environment is created by using the housing, fixed ring, partition plate, and precise bearing preload force structure. This sealing design effectively avoids the influence of external factors on the performance of the oil pump, reduces the possibility of lubricating oil leakage, and thus improves the reliability and durability of the entire transmission.

[0081] 3. The positions and structures of the low-pressure oil groove and the high-pressure oil groove, in cooperation with the dynamic pumping mechanism of the rotor system, ensure the efficient conversion of the lubricating oil between the low-pressure side and the high-pressure side, realizing the precise control and distribution of the oil. This optimization enables the lubricating oil to reach the key lubrication parts of the transmission quickly and accurately according to requirements, improves the lubrication efficiency, reduces the wear of internal components, and extends the service life of the transmission.

[0082] The above embodiments can also be used in the field of device technology. That is, according to another aspect of the present invention, a vehicle is provided, including a transmission, and the transmission is the transmission described in any one of the above embodiments.

[0083] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship between one device or feature and other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0084] In addition to the above, it should also be noted that the "one embodiment", "another embodiment", "embodiment" etc. mentioned in this specification refer to the specific features, structures or characteristics described in connection with that embodiment being included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in connection with any one embodiment, it is intended that implementing such feature, structure or characteristic in connection with other embodiments also falls within the scope of the present invention.

[0085] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A transmission with a pump body structure, characterized in that, Comprising: A housing (400) having a receiving cavity, with an oil inlet passage and an oil outlet passage provided on the side wall of the receiving cavity; A pump body assembly (100) disposed within the receiving cavity, the pump body assembly (100) having a rotor system and a connecting shaft (110), a first end of the connecting shaft (110) being connected to the rotor system, and the rotor system having a high pressure side (600) and a low pressure side (500); A drive shaft (200) connected to a second end of the connecting shaft (110), the drive shaft (200) being configured to drive the connecting shaft (110) to drive the rotor system to rotate, such that the high pressure side (600) has a communicating state when communicating with the oil outlet passage, and the low pressure side (500) has a communicating state when communicating with the oil inlet passage.

2. The transmission according to claim 1, characterized in that, The pump body assembly (100) includes: A fixing ring (140) located within the receiving cavity, the fixing ring (140) being in interference fit with the inner wall of the housing (400); A partition plate (150) disposed between the fixing ring (140) and the drive shaft (200), one side of the partition plate (150) abuting against the bearing (300) of the transmission, the other side of the partition plate (150) abutting against the fixing ring (140), an accommodation space being formed between the partition plate (150), the fixing ring (140) and the housing (400), the rotor system being disposed within the accommodation space, the drive shaft (200) being connected to the housing (400) through the bearing (300), and one end of the connecting shaft (110) passing through the partition plate (150) to be connected to the drive shaft (200).

3. The transmission according to claim 2, wherein, The rotor system includes: A driving rotor (120) circumferentially disposed along the connecting shaft (110), the driving rotor (120) being fixedly connected to the connecting shaft (110); A driven rotor (130) circumferentially disposed along the driving rotor (120), the driven rotor (130) being meshed with the driving rotor (120), the drive shaft (200) being configured to drive the connecting shaft (110) to drive the driving rotor (120) to rotate, and the driving rotor (120) driving the driven rotor (130) to rotate within the accommodation space through meshing transmission, such that the driven rotor (130) forms the high pressure side (600) and the low pressure side (500) within the accommodation space.

4. The transmission according to claim 3, wherein There is a first eccentricity between the central axis of the driving rotor (120) and the central axis of the driven rotor (130).

5. The transmission according to claim 4, wherein The fixing ring (140) includes: A fixed ring body, the outer diameter dimension of the fixed ring body being the same as the maximum dimension of the partition plate (150), the axial dimension of the fixed ring body being greater than the axial dimensions of the driving rotor (120) and the driven rotor (130), and the driven rotor (130) being in clearance fit with the inner wall of the fixed ring body; Wherein, the inner ring of the fixed ring body and the outer ring of the fixed ring body are eccentrically arranged, and the outer ring of the fixed ring body is coaxially arranged with the connecting shaft (110). There is a second eccentricity between the inner ring and the outer ring of the fixed ring body, and the second eccentricity is the same as the first eccentricity. The driven rotor (130) rotates along the inner ring of the fixed ring body.

6. The transmission according to claim 2, characterized in that The partition plate (150) is provided with an annular boss (151), the end face dimension of the annular boss (151) being the same as the end face dimension of the inner ring of the bearing (300), and the annular boss (151) being in contact with the bearing (300).

7. The transmission according to claim 3, characterized in that During the relative rotation of the driving rotor (120) and the driven rotor (130), the volume between the driving rotor (120) and the driven rotor (130) alternately forms the low-pressure side (500) and the high-pressure side (600).

8. The transmission according to claim 7, wherein, The oil inlet passage includes a low-pressure oil groove (410) and an oil suction port (430). The low-pressure oil groove (410) is arranged on the side wall of the accommodating cavity away from the driving shaft (200), and the oil suction port (430) is penetratingly arranged at the bottom of the low-pressure oil groove (410).

9. The transmission according to claim 8, characterized in that, The oil outlet passage includes: a high-pressure oil groove (420) and an oil discharge port (440). The high-pressure oil groove (420) and the low-pressure oil groove (410) are symmetrically arranged along the axis of the driving shaft (200), and the oil discharge port (440) is penetratingly arranged at the bottom of the high-pressure oil groove (420).

10. A vehicle, comprising a transmission, characterized in that, The transmission is the transmission according to any one of claims 1 to 9.

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